fix(preview): 添加对 baseline.surface 的数组检查以避免潜在错误

src/page-components/scheme/q-2-scheme/Preview.tsx

@@ -1,4 +1,4 @@
-import { capitalize, keys } from 'lodash-es';
+import { capitalize, isArray, keys } from 'lodash-es';
 import { FC, ReactNode, useMemo } from 'react';
 import { useColorFunction } from '../../../ColorFunctionContext';
 import { ScrollArea } from '../../../components/ScrollArea';
@@ -127,7 +127,8 @@ const PreviewBlock: FC<PreviewBlockProps> = ({ baseline, title }) => {
         <PreviewLine name="Neutral Variant" unit={baseline.neutralVariant} />
       </div>
       <div className={styles.preview_surface}>
-        {baseline.surface.map((surfaceSet, index) => (
+        {isArray(baseline.surface) &&
+          baseline.surface.map((surfaceSet, index) => (
             <div className={styles.surface_block} key={index}>
               <PreviewLine key={index} name={`Surface ${index + 1}`} unit={surfaceSet} />
             </div>